Stock feeding mechanism



Dec. 22, 1936.

J. E. LOVELY STOCK FEEDING MECHANISM Filed May 7, 1934 5 Sheets-Sheet 1w T \Q Jw 5 y Q W fi A j Q j Q A. 0

Dec. 22, 1936. J E LOVELY STOCK FEEDING MECHANISM Filed May 7, 1934 5Sheets-Sheet 2 172 i- ZZZIMZ WW Dec. 22 1936. J. E. LOVELY 2,065,083

STOCK FEEDING MECHANI SM Dec. 22, 1936. J. E. LOVELY $TOCK FEEDINGMECHANISM Filed May 7, 1934 5 Sheets-Sheet 4 Patented Dec. 22, 19362,065,083 STOCK FEEDING MECHANISM John E. Lovely, Springfield, Vt.,minor to Jones & Lamson Machine Comp Sn insfield, ve,

'a corporation of Vermont Application May 77 1934, Serial No. 724357 30Claims.

This invention relates to mechanism for feeding stock, as, for example,bar stock, in a lathe, to the tools for operating on it. Qne of theobjects of this invention is to provide such a mech- 5 anism wherein thechuck for gripping the work may be opened and the stock fed therethroughand the chuck again closed by the actuation of a single operatingmember.

A further object is to provide a feed mechanism by which the amount offeed may be determined as desired.

Still another object is toprovide for the return of the stock feedinggrip member to its initial position after a feeding motion.

A further object is to provide means whereby the work may be either fedor retracted as de sired.

Another object is to provide an improved work feed member adapted tostock of various cross sectional shapes.

Other objects and advantageous features will appear from a more completedescription of an embodiment of this invention disclosed in theaccompanying drawings in which Figure 1 is a side elevation of a turretlathe showing the stock feeding mechanism applied thereto.

Figure 2 is a detail cross section of a support for the stock, on line2-2 of Figure 1.

30 Figure 3 is a fragmentary top plan partly broken away of the feedmechanism.

Figure 4 isa fragmentary view partly in elevation and partly broken awayand in section of the same.

Figure '5 is a detail section on line 5-5 of Figure 3.

Figure 6 is a detail section on line 6-45 of Figure 5.

Figures 7 and 8 are fragmentary views similar to a portion of Figure 6,but showing parts in different positions.

Figured) is a detail section on line 9-9 of Figure 5.

Figures 10 and 11 are fragmentary views similar to a portion of Figure3, but showing the actuating handle lever in chuck-open and stockfeedingpositions, respectively.

Figure 12 is a view similar to Figure 9, but showing the parts in thepositions of Figure 10.

Figure 13 is asection on line |3I3 of Figure 4.

Figure 14 is a detail section on line l4ll of Figure 13. Figures 15 and16 are detail sections on lines l5l5 and Iii-l6, respectively, of Figure14. 55 Figure 17 is a view similar to a portion of Figure 13, andshowing stock of hexagonal cross section.

Referring first to Figure 1, at [is indicated somewhat diagrammaticallya turret lathe although it should be understood that this inven- 5 tionis applicable to other types of machines. As shown this lathe isprovided with a head-stock 2 through which 'extends a hollow workspindle '3 having a chuck 4 at its end for gripping the 1 stock to beoperated upon. 10

' The mounting of the work spindle 3 in the headstock is shown more indetail in Figure 4. As therein shown the spindle is provided inwardly ofthe headstock 2 with a spindle nose 5 to which is secured the outermember 6 of the 15 chuck 4, which, as shown, is of the collet type. Thismember 6 is provided with a conical bore 1 for cooperation with themating inclined faces of the collet jaws 8, the arrangement being suchthat on movement of the collet jaws to the right, 20 as seen in Figure4, these jaws are wedged together into gripping relation with the work,workgripping shoes being shown at 9 which directly engage the work. Thecollet tube I0 is extended through the spindle 3, bears at its forwardend 25 against the rear end of the collet, and at its rear end on acollar lOa provided with an outwardly turned flange II at its rear endwhich may be engaged by suitable spring pressed plungers l2 seated in asleeve l3 carried on the rear end of 30 the spindle 3. The spindle 3 maybe supported in suitable bearings such as [5 in the headstock and may berotated by any suitable means not necessary to describe herein since itforms no part of the present invention.

In order to force the collet tube, as viewed in Figure 4, so as to gripthe stock extending therethrough, a plurality of grip levers l6 may beemployed. Each of these levers I 6, as shown in Figure 4, is fulcrumedon the sleeve 13 as at H and has an inwardly directed end portion l8which bears against the outer face of the flange II. The other arm ofeach lever l6 may be provided with a cam roller l9 which may ride on theouter face of a cam sleeve 20. This cam sleeve is slidable axially onthe work spindle 3 and is provided with a tapered outer face at 2|,which, when the sleeve is moved to the left, as viewed in Figure 4,rides inwardly of the cam rollers l9 and forces these cam rollersoutwardly, this acting to move thelever portions l8 in a direction topress the collet tube ill in -work-gripping direction. The plungers l2act to hold the levers IS with their cam rollers l9 in contact with thecam sleeve 20.

2. r Qyadeaose As shown best in Figure 3, this sleeve 28 may be housedwithin a casing 25 which may be secured as by bolts 22 to the end faceof the headstock 2 andthis casing 25 may'also be employed to sup- 5 portthe feed mechanism which will now be. de-

v(see Figure 5) with a pair of vertically spaced bearing portions-26 and21. The upper of these bearings 26 is a split bearing having a separable10 member 23 secured to the other member as by bolts 28 and this bearinghas a sufiiciently large internal opening to receive the reduceddiameter portion 29 ofa rock sleeve 38. This sleeve 38 is in turnjournaled on a rock shaft 3| whichex- 15 tends down through and isjournaled in the lower 3 bearing 21. The upper end ofthe rock shaft 3|is provided with a head 32 to which\is pivoted on a transverse pivot 33a lever 34 having a handle portion 35 at itsouter end. This lever 34, as20 shown, is provided with a'socket portion 36 which engages over thehead 32 and encloses this head, the lower edges 31' and 38 of the socketacting as stops to limit the extent of pivotal motion of the handle. Theportion 38 defines the lower lim- ,26 it of pivotal motion of thishandle, this edge'then riding on the top of the sleeve 38, and definesthe lower path of angular motion of the handle as it is swunghorizontally to rock the rock shaft 3|. By lifting the handle 35 theportion 31 may be 88 brought down against the top of the sleeve 38 andthe handle may be moved in the same horizontal relation to rock theshaft 3|, but in a difierent path. The reasons for this rocking motionwill later appear. v 85 The sleeve 38,- as shown best in Figure 6, isprovided with a pair of spaced arms 48, carrying adjacent to their endsand facing toward each other, pins 4| carrying anti-friction rbllers 42.These rollers ride within a groove 43 in the chuck- 40 actuating sleeve28 previously described, so that as the'sleeve 38 is turned from theposition shown in Figure 3 to that shown in Figure 10, the sleeve 1 28is moved to the right out from between the chuck-actuating arms l6,permitting the chuck 45 to spring open. Conversely when the sleeve 38 isrocked in the opposite direction from the position shown in Figure 10 tothat shown in Figure 3, the sleeve 28 is moved in between the arms I6,forcing the roller ends l9 apart and closing the 50 chuck.

Provision is made by which rocking of the handle 35 when in'its lowerpath of motion and- '55 orclosed, depending on the direction of suchrocking. This is accomplished by the following mechanism. The lever 34is shown as provided at a short distance from the rock shaft 3| with ahardened plug 58 which is shown as provided with a shank which may beinserted in a hole 52 in the lever 34 and there secured as by a setscrew 53. Cooperating with this plug 58 is a similar hardened plug 55having its shank portion 56 similarly secured in an arm 51 which may bein- 5 tegral with or secured to the upper end of the sleeve 38. The plug58 may bear against the plug 55 when the handle is being moved from itsposition of Figure to its position of Figure 3, thusthe lever 34 and thearm 51 may move in both" angular directions as the handlev 35- is swunghorizontally. The dog 68 is also provided with a foot 63 which may ridealong the upper face of a block 64 secured to the bearing 26. This block5 scribed. This member 25, as shown, is provided j 64 is of such lengththat, as the lever 34 is turned in a direction to rock the rock shaft 3|and to turn the sleeves 38 with it, when this sleeve 38 has been turnedsufiiciently to fully open the chuck, the foot 63 rides off the inclined10 end 65 of the block 64, whereupon its weight causes it to swing intothe position shown in Fig- .ure 7 thus to fall away from engagement withthe plug 58, whereupon the plug 58 can move away from theplug 55 so thatthe arm 51 is no longer secured for rocking with the lever 24 inonedirection. Thus when the lever is swung from the position shown inFigure 3- to that shown in Figure 10, the chuck is fully opened, but thelever, which is now uncoupled from the sleeve 38, may swing forwardly toa further angular extent but without effect on the chuck mechanism. Thisfurther angular motion of the lever 34, rocking the rock shaft 3|, isemployed to produce the feed of the stock as will now be described.

Referring again to Figure 1, at 18 is shown a stand spaced from theheadstock end of the machine and which may have at its top suitablemeansas at.1| for supporting stock to be fed to the headstock of thelathe. As shown in Figure 2, this portion 1| may be formed as a head 12having spaced sockets 13 at its lower end in which may be received theupper ends of supporting rods 14, which, at their lower ends may besupported in a suitable base 15. At its upper end the head 12 may beprovided with work-supporting rolls 16,

- into which the bearing rollers 16 project. The

head 12 is also shown as receiving a pair of bars 86 which may besecured therein as by set screws 81 and these bars extend over to thehousing member 25 where they may be secured by any suitable means, beingshown as seated in sockets in an extension 82 thereon. The head 12 isalso, provided with a guide opening 84 to slidably receive a rack bar 85shown as keyed against rotation therein. This rack bar also extends inaxial sliding relation into the frame portion 82 and is arranged formotion parallel to the lengths of the guide bars. The bars 86 formguiding members for the slidable reception of stock-gripping or engagingmechanism 98 which has a frame portion 9| (see Figure 13) provided withtubular .bearing portions 92 through which the bars 86 slidably pass.

A preferred form of stock-engaging means is shown in detail in Figuresl3 and 1'1. Referring to these figures, at I88 is shown a sleeve throughwhich the stock passes, this sleeve being journaled on ball bearings |8|within a casing I82 secured as by screws I83 to the frame portion 9|.The sleeve )8 is shown as provided with an end portion |85'of enlargeddiameter having in its outer face an annular recess |86 within which isjournaled a ring |81. This ring is provided with 7 beveled gear teethI88 on its rear face which mesh with corresponding teeth of a pinion I89on a shaft 8. This shaft 8 extends radially through the outer wall I ofthe portion |85 and has a suitable polygonal socket portion "-2 at itswith their faces outer end for the reception of a tool by which it maybe rotated, thus to rotate the ring I06. This ring I06 on its outer faceis provided with spiral ribs I09 which form a scroll for closing ,andopening the work-engaging jaws I I5 and I I6 as the ring is turned. Thejaws II5 are shown as diametrically opposite to each other and eachcomprises a block I I1 having rack teeth I I8 on its back face engagingthe ribs of the scroll and having adjustably secured thereto, as by thescrews H9 and I20, an angular shaped member I2I which is provided with awork-engaging face I22 at its inner end. Each of the jaws H6 is providedwith a spring pressed plug I25 having a head I26 riding in an enlargedsocket I21 which houses a spring I28 backed up by a threaded plug I29which closes the outer end of the socket. Thus two of the four jawsshown are yielding, while the others are rigid but adjustable. Thispermits the mechanism to be set to properly engage work of various crosssectional shapes satisfactorily. For example, in Figure 17, stock I30 ofhexagonal cross section is shown, the fixed jaws engaging I 22 onopposite edges of the stock while the yielding jaws with their plugs I25engage flat faces of the stock. The jaws should be so adjusted that thestock is gripped sufficiently tightly so that when the collet chuck isopen, motion of this gripping means will cause stock to pass through thechuck, while when the chuck is closed on the work, this gripping meansmay be moved axially of the stock without undue friction thereon.Similarly stock of other cross sectional contours such, for example, asround, square, and many others, may be properly engaged by the jaws, thefixed jaws being adjusted to engage diametrically opposite parts of thestock and the yielding jaws adjusting themselves automatically to theportions of the stock presented thereto-,

ward.

As shown in Figure 16 each of the jaws may be held in position byforming its main block portion with fins I35 which ride in suitableradial grooves I31 within the portion I05.

Means are provided by which rocking of the handle 35, which results inrocking the rock shaft 3|, is effective to move the work-engaging means00 to feed the work under controlled conditions as will later appear.The rack bar 85 hereinbefore mentioned is slidably guided through theframe member 9| parallel to the direction of motion of the work-engagingmeans 90, as shown best in Figures 13 and 15, extending through a sleeveportion I40 thereof. Pivoted 5n the screw I4I secured to this frameportion 9| is a double ended dog I42 having the ratchet toothextremities I43 and I 44, either of which-may be brought into operativerelation to the teeth of the rack bar 85. In order to determine whichone of these ratchet teeth will be in operation, a rocking abutmentmember I44 has been provided. This abutment member is pivoted as on thescrew I45 and has engaged around this pivot screw a torsion spring I46,portions near the ends thereof normally engaging on the corners I41 andI48 of the dog I42. The abutment member I 44 is provided with stopportions I48 and I50, which limit the uncoiling motion of opposite endportions of the spring I46. This member I44 is also shown as providedwith spaced abutments I 5| and I 52. The

abutment I5I is engaged by a plug I 53 spring pressed outwardlythereagainst by the spring I54 seated against a threaded plug I55 whichcloses the outer end of a bore I56 in which the plug the outer end ofthis I I53 is slidably mounted. The abutment I52 may be engaged by a rodI58 slidably mounted in sub stantially parallel relation to the plug I53 and rod I58 is engaged by the lower end of an arm I60 (see Figure 13)keyed to a rock shaft I6I. This rock shaft is slidably journaled in aportion I62 of the stock-engaging means 90 and is shown'as journaled atits outer end, as at I64, in an ear I65 of the work support H. The otherend portion of the rock shaft I6I is journaled in the bearing portion 21which also carries the rock shaft 3|. Keyed to this rock shaft I'6I atthe bearing 21 is a lever I10, the upper end of which at I1I may bearagainst an abutment screw I12 adjustably secured in the rock sleeve 30,the arrangement being such that when the rock sleeve 30 is in theangular position wherein the chuck 4 is closed, the abutment screw I12is in contact with the portion 'I1I, as shown in Figures 6 and 9. Thisholds the rock shaft I6I in such angular position that the arm I60 haspressed the rod 'I58 into the position shown in Figures 13 and 15 sothat the member I42 is rocked to bring the ratchet extremity I44 intooperative engagement with the rack bar 85. Motion of the rack bar 85 tothe left, as

shown in Figure 15, will then be effective to carry the stock-engagingmeans 90 to the left with it, while motion of the rack bar 85 to theright will permit motion of the rack bar Without moving thestock-engaging means 90. Thus in this position of the partsreciprocatory motion of the rack bar 85 will be efiective to causemovement of the stock-engaging means 90 away from theheadstock andtoward the work support 10.

Motion of the rack bar 85 is produced by rocking of the handle 35 aswill now be explained. 0n the lower end of the rock shaft 3I is pinnedan arm I to the outer end of which is pivotally connected one end of alink I8l. The opposite end of the link IBI is provided with a slot I 82through which passes a headed pivot pin I820 which is secured to therack bar 85. Thus as the handle 35 is turned from the position shown inFigure 10 toward the position shown in Figure 11, the rack bar 85 ismoved to the right.

The slot I82 in the link I8I prevents the initial rocking motion of thehandle 35 throughout the range of arc indicated in Figure 10 by thearrow a, from being effective to move the rack bar 85,

this initial motion through the are a, as previously described, actinghowever to open the chuck 4 when the handle is in its lowered positionwith the abutment 38 of the lever 34 in contact with the top of the rocksleeve 38. This initial angular motion of the handle 35 which opens thechuck, however, is sufli'cient in amplitude to swing the stop screw I12of the sleeve 30 out of contact with the end I1I of the lever I10, thisend of which is immediately rocked inwardly by the action of the springpressed plug I85, as shown best, for example, in Figure 12. This rockingof the shaft I6I withdraws the arm I60 from the outer end of the rod I58, whereupon the spring I54 is effective to press the plug I53 againstthe lug I SI of the member I42 thus to remove the ratchet point I44 fromoperative relation to the rack bar 85 and to move the point I43 intoactive relation. In this position of the parts, which is shown in dottedlines in right of the rack bar 85 by swinging the handle 35 through thearc b shown in this figure, is effective to move the work-engaging meanstoward the headstock of the machine, and since the chuck 4 has alreadybeen opened in the initial-angular motion forwardly through the chuck.As the handle 35 is returned toward its initial position of Figure 3,after the lost motion between the pivot is: and the link m is taken up,the rack bar 85 is moved to the left, but in this position of the dogI42, it is ineffective to move the stock-engaging means 90. Thus by aback and forth motion of the handle 35 when in its lower path, the stockis fed intermittently through the chuck to any desired extent and whenthis feeding has progressed to the desired point, the handle is returnedto the angular position of Figure 3, whereupon the chuck 4 closesagainst the stock in its new axial position. This back and forth feedingmotion of the handle- 35 moves the stock-engaging means 90 by successivesteps toward the headstock of the machine andaway from the work supportI0. Provision is therefore made by which it may be returned toward thestock support prior to a further feeding motion. This may be effected byraising the handle 35 into its upper path of rocking motion and thenoscillating it back and forth in thisupper path. Raising of the handlein this manner lifts the plug 55, as shown in Figure 8, above the upperend of the dog 60, so that it can move over the top of its lug 62 sothat rocking of the handle back andforth in this up- 30 and is thusineffective to open the chuck 4. In this stationary angular position ofthe rock sleeve 30, however, the abutment I12 remains in the positionshown in Figure 6, holding the lever I10 in such angular relation thatthe rock shaft 16! holds the ratchet point I44 in operative positionwith relation to the rack bar 85. As the handle is swung forwardlytoward the position of Figure 11, therefore, the rack bar is moved tothe right without moving the stock-engaging means 90, but on the reversedirection of motion of the handle 35 it moves the rack bar 85 to thetherewith. At this time, however, the chuck 4 is closed so that thestock-engaging means 90 slides back on the stock without producing anyfeed motion thereof.

The stock stop, as shown at I90 in Figure '1 carried by the turret l9l,is commonly employed to limit the forward feed of the stock, and theposition of this stop is commonly controlled by the mechanism whichdeterminesthe position of the turret relative to the headstock 2. Bymoving the turret saddle toward the headstock while the chuck 4 is openthe stock may be pushed rearwardly.

If desired, however, the stock may be retracted relative to the chuck bysuitable actuation of the handle 35, and when this is desired, thehandle-35 is swung toward the positions of Figures 10 and 11 while inits lower path, so that the chuck is opened at the first part of thismotion, thereupon the lever H0 is held in the position shown in Figure 6by hand,. a handle I90 being provided for that purpose. When so held thedog I42 is retained in the position shown in-Figure 15, so that asthe'rack bar 85 is moved to the left by continued motion of the handle35 toward the position shown in Figure 11, the stock-engaging means 90is moved away from the headstock. As, however, the chuck 4 has beenopened, this motion is efiective to retract the stock relative to thehead-stock.

From the foregoing description of an embodiof the handle 35, it iseffective to feed the stock per position is ineffective to rock the rocksleeve left and the stock-engaging means 90 is moved those skilled inthe art that various changes and modifications might be made withoutdeparting from the spirit or scope ofthis invention as defined by theappended claims.

I claim:

1. In combination, a chuck for receiving a length of work,stock-gripping means back of said chuck, and means including connectionsto said gripping means and chuck and a single operating member actuable.in one manner to move said gripping means toward said chuck while saidchuck is open to feed the stock and in another position to retract saidgripping'means relative to the stock to change the position of itsengagement with said stock.

2. In combination, a chuck for receiving a length of work,stock-gripping means back of said chuck by movement of which toward saidchuck the stock is fed thereto, and means including connections to saidgripping means and chuck and a single operating member actuable toretract said gripping means along the stock to change the position ofits engagement with said stock. v

3. In combination, a chuck for receiving a length of work,stock-gripping means back of said chuck by movement of which toward saidchuck the stock is fed thereto, and a hand lever and connections to saidgripping means and.

chuck from said hand lever to cause actuation of said hand lever toretract said gripping means along the stock to change the position ofits toward said chuck while said chuck is closed.

5. In combination, a chuck for receiving a length of stock,stock-gripping means back of said chuck, and manually actuable meansincluding asingle actuating member and connections to said grippingmeans and chuck, operable selectively to move said gripping means towardor away from said chuck while said chuck is closed. I

6. In combination, a chuck for receiving a length of stock,stock-gripping means at one side of said chuck, a movable member,uncoupling connections between said member and chuck operativethroughout one part only of the movement of said member for opening andvclosing said chuck, and connections between said'membet and meansoperative in another part of such movement while said chuck is uncoupledtherefrom for moving said means toward or from said chuck.

7. In combination, stock-gripping means, a movable actuating member forsaid means, and ratchet means selectively coupling said member andgripping means for simultaneous movement during movement of said memberin one or the other directionwith freedom of movement of said member inthe opposite direction without moving said gripping means.

8. In combination, stock-engaging means, a member, means supporting saidmember for moone of said paths to move said means in one direction andto cause the opposite direction.

9. In combination, stock-engaging means, a chuck, a member selectivelymove said means but inoperative to aifect said move said means towardsaid chuck when said member is moved member in the other said chuckremains closed when said member is moved in the other of said paths.

11. In combination, a chuck forreceiving a length of stock,stock-engaging means, a member, means supporting said member for motionin either selected of a pair of paths, connections between said member,chuck and engaging means operative to open said chuck and then to movesaid means toward said chuck when said member is moved in one of saidpaths, and to move said member in the other direction while said chuckremains closed when said member is moved in the other of said paths, andmeans selectively operative to cause movement of said member in said onepath to move said means away from said chuck.

12. In combination, a chuck for receiving a length of stock,stock-engaging means, a handle rockably mounted, connections from saidhandle.

actuable to open said chuck on rocking of said handle through an arcfrom one angular position and to close said chuck on reverse rocking ofsaid member to said position, a movable member, connections from saidhandle to said member causing oscillation of said handle through anotherare to move said member back and forth, and one way driving meansbetween said member and engaging means causing motion of said member inone direction only to move said stock-engaging means.

13. In combination, a chuck for receiving a length of stock,stock-gripping means, a handle rockably mounted, connections from saidhandle actuable to open said chuck on rocking of said handle through anarc from one angular position, a, movable member, connections from saidhandle to said member causing oscillation of said handle through anotherare to move said member back and forth, means causing motion of saidmember in one direction only to move said stockgripping means, and meansfor selecting the operative direction of motion of said member.

14. In combination, a chuck for receiving a length of stock,stock-engaging means, a rock shaft, a lever pivoted to said shaft toswing in a plane lengthwise thereof and rockable transverse to saidplane to rock said shaft, an arm journaled on said shaft, connectionsbetween said arm and chuck for opening and closing said chuck on rockingof said arm, means for retaining said lever and arm in operativeconnection when said lever is in one angular position about its pivotand throughout only an arc of rocking of said,

r ckable means to arm suflicient to open and close said chuck, a.

tional configurations.

17. In combination, a length of stock, a stoc chuck, means for closingchuck for holding a k ripper back of said and opening said chuck,

and then to retract said gripping means or to be inoperative to opensaid chuck.

20. In combination, a chuck for handle pivot to move said gripper towardor' from said chuck, rockable means for opening and closing said chuck,and selectively. cooperating parts on said handle and manually operablemeans for mov-.

cause swinging of said handle gchuckga pivotally mounted handle,connections including lost motion between said handle and gripper tocause swinging of said handle about its pivot after said lost motion istaken up to move said gripper toward or from said chuck, rockable meansfor opening and closing said chuck, and selectively cooperating parts onsaid handle and rockable means to cause said swinging of said handle inone direction during the taking up of said lost motion to rock saidrockable means.

22. In combination, a chuck for receiving a length of stock, a stockgripper back of said chuck, a handle pivoted for motion in planestransverse to each other, connections from said handle to said gripperto cause swinging of said handle in one of said planes to move saidgripper toward or from said chuck, rockable means for opening andclosing said chuck, and parts on said handle and rockable meanscooperating when said handle is, in one angular position in 'the otherof said planes and out of cooperative position in another angularposition, whereby rocking of said handle to move said gripper may beoperative or'inoperative at will to move said rockable means.

23. In combination, a chuck for receiving a length of stock, a stockgripper back of said chuck a rockable member, a handle pivoted coaxiallywith said rockable mem 'r and mounted to swing transversely of saidpivot toward or from said rockable member and into or out of operativeengagement therewith for simultaneous rocking motion, operativeconnections between said rockable member and chuck for causing rockingof said member to open or close said chuck, and connections from saidhandle to said gripper to cause rocking of said handle about its pivotto move said gripper toward or from said chuck.

24. In combination, a chuck for receiving a length of stock, a stockgripper back of said chuck, a rockable member, a handle pivotedcoaxially with said rockable member and mounted to swing transversely ofsaid pivoted member and into or out of operative engagement therewithfor simultaneous rocking motions, operative connections between saidrockable member and chuck for causing rocking of said member to open orclose said chuck, connections from said handle to said gripper to causerocking of said handle about its pivot to move said gripper toward orfrom said' chuck, said last-mentioned connections including lost motionduring which said rockable member is rocked when said handle is inoperative relation thereto, and means for operatively disconnecting saidhandle and rockable member when said handle has turned said means to apredetermined angular extent in one direction.

25. In combination, a chuck for receiving a length of stock, a stockgripper back of said chuck, a member rockable on a substantiallyvertical axis, operative connections from said member to open or closesaid chuck on rocking of said member, a handle pivoted coaxially withsaid rockable member thereabove, said member having spaced elements onits upper end between which a part of said handle may engage, saidhandle being rockable upwardly out of cooperative relation with one ofsaid elements to opera'-' connections between after a predeterminedextent of said handle in member in one or tively disconnect said handlefrom said member, said handle and gripper to cause horizontal swingingof said handle beyond a preliminary lost motion to move said grippertoward and from said chuck, and means acting 5,

of rocking of said member to cause one of said elements to release saidhandle for further swinging independently of said rockable member.

26. In combination, a chuck for receiving a 10 length of stock, a stockgripper back of said chuck, a member rockable on a substantially veroutfrom between said elements to operatively handle and rockable member,

handle in its lower position in one direction acting to open said chuckduring 21 the taking up of said lost motion, and means for releasingsaid element to permit further motion the same direction after saidchuck has been opened to move said gripper.

2'7. In combination, a chuck for receiving a length of stock, a stockgripper back of said chuck, a member movable substantially parallel tothe length of said stock, ratchet connections between said member andgripper to cause motion of said member in either selected direction tomove said gripper in' the corresponding direction, a member rockable ona substantially vertical axis, connections from said member to open orclose said chuck on rocking of said rockable member in one or the otherdirection, a handle rockable coaxially with said rockable member, andoperative connections from said handle to said movable member to causerocking of said handle to move said movable member, said handle androckable member having parts selectively cooperating to cause swingingof said handle in one direction to first rock said rockable member toopen said chuck or to leave said chuck closed and thereafter to movesaid movable member toward and from said chuck, operative connectionsfrom said rockable member to said ratchet connections to cause saidrocking to couple said gripperfor movement with said movable membertoward said chuck to thereby feed stock thereto, and to cause swingingof said handle when operatively disconnected from said rockable memberto cause said ratchet connection to connect said movable member andgripper for motion of said gripper away from said chuck.

28. In combination, a chuck for receiving a length of stock, a stockgripper back of said chuck, a member movable substantially parallel tothe length of said stock, ratchet connections between said member andgripper to cause motion of said member in either selected direction tomove said gripper in the correspondingdirection, a member rockable on asubstantially vertical axis, connections from said member to open orclose said chuck on rocking of said rockable the other direction, ahandle rockable coaxiallywith said rockable member, operativeconnections from said handle to said disconnect said swinging of said.movable member to cause rocking of said handle to move said movablemember, said handle and rockable member having parts selectivelycoopwith said member, said element being biased to eratingto causeswinging of said handle in one retract as it rides at! said member tothereby op-' 1 l chuck to thereby feed stock thereto, and to causelength of work, a. rockable member, connections 10 from said chuck, andmeans for adjusting said therefrom between which a portion of said lever15 has been opened. disconnect said lever from said member, a stock 20lever fulcrumed coaxially with said member, said member, and means forselecting the direction of 25 of said elements during a portion of itsmotion, JOHN E. LOVELY.

